@article{960634,
      note = {"Papers presented at a conference held Oct. 8-10, 1994, at  Aspen, Colorado."},
      author = {Hughes, J. Donald,},
      url = {http://library.usi.edu/record/960634},
      title = {The face of the earth : environment and world history /},
      recid = {960634},
      pages = {1 online resource (222 pages).},
}